Genetics Answers

1.   Approximately, how many mass extinction events occurred throughout the evolutionary history of animals?

A.   3

B.   4

C.  5

D.  More than 5

2.      Until recent discoveries suggested otherwise, animals existing before the Cambrian period were believed to be____?

A.     Small and ocean dwelling

B.     Small and no motile

C.     Small and soft-bodied

D.     Small and radially symmetrically

3.      Which of the following mechanism of change was brought by the exchange of genes during the process of meiosis that leads to the formation of new gametes that are different form its parent?

A.     Mutation

B.     Genetic drift

C.     Natural selection

D.     Recombination

1.you are given the chance to modify a trait of certain plant (pineapple, coconut, corn, rice, manggo, banana, guava).

these are the things that you consider to make a genetically modified organism (GMO)

a. identify special trait

b. identify a source organism

c. identify a target organism

d. identify the modified trait/added trait

e. what benefits would the recombinant organism provide to society?

identify at least 2 desirable or enhanced trait that each of them has. the first one will be given as an example.

EXAMPLE OF PLANTS AND ANIMALS

1.      grapes

2.      guapple

3.      corn

4.      rice

5.      coconut

6.      banana

7.      bittermelon

8.      cow

9.      chicken

10.  pig

DESIRABLE OR ENHANCED TRAIT

1. seedless fruit
   

9.

10.

DNA is directly involved as a template in the following process except

1) Replication

2) Transfection

3) Translation

3) Transcription

4) Mutation

Since blood cells can't divide then how is karyotyping done?

How is the behaviour of chromosomes during cell division leading to variation? 

4. Colorblindness is an X-linked trait caused by a recessive allele. A carrier female marries a normal male. (Punnett Square: 4 points)

a. How many of the male offspring can be expected to be color-blind? (1 point)

b. How many of the male offspring can be expected to have normal vision? (1 point)

c. How many of the female offspring can be expected to be carriers? (1 point)

d. How many of the female offspring can be expected to be normal? (1 point)

4. Colorblindness is an X-linked trait caused by a recessive allele. A carrier female marries a normal male. (Punnett Square: 4 points)

A. Read and analyze the following genetic problem. Answer what is being asked. Show complete solution in a separate paper then take a picture and upload it here.(Genotypes of P, Punnett Square and GR, PR).

2. If you crossed a heterozygous spotted lizard with a homozygous green lizard, what percentage of their offspring would be green and what percentage would be spotted? Note: You may use your own letters to signify the alleles.

How does the structure of DNA account for the wide range of differences in life